Crane or derrick.



A. P. LUNDIN.

CRANE 0R DERRICK.

APPLICATION FILED DEC. 29. 19]].

j i ffl Patented Dec. 5, 1916.

2 SHEETS-SHEET I.

A. P. LUND|N.-

CRANE OR DERRICK. APPLICATION FILED DEC.29, 1911.

LQUFfiQfi. Patented Dec. 5, 1916.

2 SHEETSSHEET 2.

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ANDREAS P. LUN DIN, OF NEW YORK, N. 'Y., ASSIGNOR TO WELIN MARINEEQUIPMENT COMPANY, A CORPORATION OF NEW YORK.

CRANE 0R DERRICK.

neon res.

Application fi1ed December 29, 1911.

To all w ham it may concern:

Be it known that I, ANDREAs l. LUNDIN, a citizen of the United States,and a resident of the borough of Manhattan, city, county, and State ofNew York, have invented certain new and useful Improvements in Cranes orDerricks, of which the following is a specification.

This invention relates to cranes and is an improvement on the inventiondisclosed in Letters Patent No. 986,399 granted to me on li larch 7th,1911.

By the use of my invention I am enabled to produce a device which may beprovided with a plurality of crane-arms or booms and which, whileoccupying considerably less space than a like number of separate cranes,

will be capable of independent operation and sluing and may be used toload or unload a barge or the like and to transport goods to oppositesides thereof, and the loading and unloading may be simultaneouslyaccomplished.

In the accompanying drawings, in which similar reference charactersdesignate corresponding parts throughout the several views, Figure 1 isa side elevation, partly in section, of a form of device embodying myinvention; and Fig. 2 is a transverse section of the device illustratedin Fig. 1, the cranes being removed for the purpose of clearness. Fig. 3is a vertical section to one side of the center of one of the framesshown in Fig. 2.

eferring now to Figs. 1 and 2, three independent frames 0 are mounted toswing pivotally upon a column B formed integrally with a base A", suchframes being provided with collars L L -L L L by means of which thethree frames are mounted upon the column B to rotate independently ofeach other, ballbearings or other suitable anti-friction devicespreferably being employed to permit easy relative movement between theframes. Each of the frames C is provided with a pair of racks c and alsosupports a worm E to have rotary but not longitudinal movement. Acrane-arm D is pivoted to a nut (l threaded on each of the worms E Theframes C are also provided with wheels 0 running upon the base A. Loadsup- Specification of Letters Patent.

Patented Dec. 5, thin.

Serial No. 668,476.

porting rope M is connected to a collar on 1ournaled on the column B bymeans of ball bearings or other suitable anti-friction devices andadapted to rotate thereabout. The opposite ends of each of the ropes lare led upwardly over pulleys P on each crane-arm and are connected attheir other ends to the outer ends of the gafis Q Suitable pulleys R aremounted at the outer end of the gafii Q} and a hoisting rope l issecured at one end contiguous to said pulley R", is led downwardly overone of the pulleys in a block S to which the securing hook is connected,is then led upwardly over one of the pulleys R thence downwardly overthe other pulley in the block S and again upwardly over the other of thepulleys R at the outer end of the gaff and thence downwardly to hoistingdrums F, which drums are mounted on a common shaft and are supported bybrackets f. Said drums are rotated as shown by a motor Gr geared to theshaft thereof by means of gears g 9 It willbe obvious that motors orother suitable means may be employed to swing the crane arms verticallyand to swing the frames horizontally around the column or pivot. Asillustrated, I provide a motor J supported on each frame, which motorrotates pinion K, shaft 70 and pinion K which meshes with the internalgear at, the said pinion K being shown in dotted lines. A screw E may berotated to swing the crane arm vertically by any suitable or convenientmeans.

Having described my invention, I claim:

1. A crane construction embodying therein a suitable base, a pivot, acircular track around said pivot, a plurality of cranes each having anindependent connection with the pivot and an independent bearing on saidtrack, a crane arm in each of the frames supported to swing vertically,means for swinging each of the crane-arms vertically inde pendently ofthe other and means for independently sluing each of the frames.

2. A crane construction embodying there in a pivotal column, a base, acircular track around said pivotal column, a plurality of frames eachhaving an independent antifriction connection With said column and anname to the foregoing specification in the independent anti-frictionbearing on said presence of two subscribing witnesses.

track a crane arm in each frame supported to swing vertically, means forswinging the ANDREAS LUNDIN' '5 crane arm vertically and means for inde-WVitnesses:

pendently sluing the frames. FREDERICK P. RANDOLPH,

In Witness whereof, I have signed my JOSEPH F. OBRIEN.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

- Washington, D. G.

